Australian

• WIA - What is Amateur Radio?
• Novice Notes Online - by Peter Parker, VK3YE
• Amateur Radio Licensing Tutorial (1st 25% of course is free)
• Syllabus for Australian AOCP and AOCLP
• Syllabus for Australian NAOCP and NLAOCP

 Other countries

• What is Amateur Radio?
• ARRL - Welcome to Amateur Radio
• RAC - What is Amateur Radio?